JSP2.0EL表达式示范 _JavaScript

JSP2.0EL表达式示例

servlet2.4 对应 JSP2.0 规范已经完全支持EL表达式，即使不用jstl也可以从session、request里取出对象属性了

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="java.util.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
Map requestMap=new HashMap();
requestMap.put("a","a");
Map sessionMap=new HashMap();
sessionMap.put("b",requestMap);
sessionMap.put("c",null);
request.setAttribute("requestMapData",requestMap);
session.setAttribute("sessionMapData",sessionMap);
%>
<font color="red">${requestMapData.a}</font>
<br>
<font color="black">${sessionMapData.b.a}</font>
<br>
<font color="blue">${sessionMapData.c.a}</font>
</body>
</html>